1999 Chevy Tahoe Rough Idle and Lurching

LTTLPRNCSSDIDI

MEMBER

1999 CHEVROLET TAHOE

V8

4WD

AUTOMATIC

115,000 MILES

I was coming off a bridge and when I fully stopped, the truck started lurching violently forward and even a bit of side-to-side. The "check engine" light flashed rapidly on and off before it stalled. I was able to restart it, the "check engine" light steady this time.

Oil pressure is fine, the battery is new, the engine isn't overheating, and there's no smell from under the hood. My computer is telling me the #4 cylinder is in need of maitenance, but a compression test is showing me it's not a broken valve. The spark plugs have been replaced, so I'm wondering what else it might be. Someone recommended it might be a "spider injector" problem. If this is the case, what kind of expense am I looking at to replace it? Is this even a valid diagnosis?

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Sunday, November 15th, 2009 AT 4:50 PM

3 Replies

MATHIASO

MEMBER

On the ignition coil, switch #3 to # 4 and # 4 to # 3.
tell me where the misfire is now?

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Sunday, November 15th, 2009 AT 5:32 PM

LTTLPRNCSSDIDI

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The misfire is still occuring between cylinders 6 & 2 (ie, the new #3 and the old #4).

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Sunday, November 15th, 2009 AT 5:55 PM

MATHIASO

MEMBER

What is the original codes for the misfire.
I thought it was #4 only.
Do you have random misfire?